Julian Date Converter

Date to Julian Converter

Enter a date to convert it to the selected Julian date format.

Enter date:

Select Julian format:

Julian to Date Converter

Enter a Julian date to convert it to a regular date.

Select Julian type:

Enter Julian date:

Select output date format:

How To Use

Date to Julian

Select a date using the date picker.
Select the desired Julian date format. This can be an ordinal date format (like yyddd) or the Astronomical Julian Day.
Click "Convert to Julian" to see the result.

Julian to Date

Select the type of Julian date you are converting from (Ordinal or Astronomical).
Enter a Julian date in the corresponding format.
Select the desired output date format.
Click "Convert to Date" to see the regular date.

FAQ

What is a Julian date?

In this context, a Julian date refers to the yyddd format, where 'yy' is the two-digit year and 'ddd' is the day of the year (from 001 to 366). This format is more correctly called an ordinal date, but is commonly referred to as a Julian date in mainframe and other business environments.

This should not be confused with the astronomical Julian date, which is the number of days since the beginning of the Julian Period (January 1, 4713 BC).

Does this tool handle leap years?

Yes, the conversion correctly accounts for leap years.